Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 91 for “"Cell systems"”.
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Thermodynamic analysis of molten carbonate fuel cell systems
… analysis of a molten carbonate fuel cell (MCFC) hybrid system to determine its efficiencies, irreversibilities and performance.The analysis includes a performance investigation of a typical molten carbonate fuel cell stack, an industrial MCFC hybrid system, and an MCFC hybrid system …
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Feasibility of fuel cell systems for building applications
… will be produced by Distributed Generation (DG) systems. DG refers to power generating technologies independent from the electrical grid, located at or near the location where electricity is consumed. Fuel Cells have become very attractive DG systems in recent years, however, Fuel Cells are still …
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Analysis of Fuel Cell Systems for Off-Road Agricultural Vehicles
L'abstract è presente nell'allegato / the abstract is in the attachment
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2,3-Butanediol production from whey permeate using immobilized cell systems
… from whey permeate by using immobilized cell systems. Two types of immobilized cell systems were developed for substrate hydrolysis and the fermentation: a $\beta$-galactosidase-active biocatalyst consisting of non-viable cells of Kluyveromyces fragilis and immobilized cells of Bacillus …
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Development Of Scaffold Architectures And Heterotypic Cell Systems For Hepatocyte Transplantation
… tissue engineering of sizable implantable liver systems is currently limited by the difficulty of assembling three dimensional hepatocyte cultures of a useful size, while maintaining full cell viability, an issue which is closely related to the high metabolic rate of hepatocytes. In this study, …
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Modelling and Optimization of Scalable Hydrogen Fuel Cell Systems for Aviation
Fuel cell systems provide one possible technological pathway for sustainable aviation propulsion; however, aviation presents unique challenges for these systems. To address these challenges, this thesis presents a modelling, simulation, and optimization tool for the sizing and performance …
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A Comparison of Two Air Compressors for PEM Fuel Cell Systems
Proton exchange membrane (PEM) fuel cells are considered one of the best potential alternative power sources for automobiles. For this application, high efficiency and high power density are required. Pressurizing the fuel cell system can give higher efficiency, higher power density and better …
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INTELLIGENT FAULT DETECTION AND ISOLATION FOR PROTON EXCHANGE MEMBRANE FUEL CELL SYSTEMS
… used to model the proton exchange membrane fuel cell nonlinear systems using a multi-input multi-output structure. This research proposed the use of radial basis function network and multilayer perceptron network to perform fault detection. After training, the neural network models can give …
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Compatibility and toxicity of polymer-coated magnetic nanoparticles on mammalian cell systems
… do still exhibit some toxicity towards the cells, as the maximum cell density of cells cultured with particles does not reach that of control cultures. Both particles were found to increase the oxygen transfer in an aqueous solution. A 1.5% solution of particle A enhanced the oxygen transfer …
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Cold-start effects on performance and efficiency for vehicle fuel cell systems
… academia and industry have been pursuing fuel cell technology as an alternative to current power generating technologies. The automotive industry has targeted fuel cell technology as a potential alternative to internal combustion engines. The goal of this research is to understand and quantify …
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Novel Polyphenylquinoxaline and Polybenzimidazole Proton Exchange Membranes For High Temperature Fuel Cell Systems
<p>Proton exchange membrane fuel cells (PEMFCs) have recently been acknowledged as one of the most promising alternative power sources due to their clean and efficient operation, as well as their numerous applications in transportation, stationary, cogeneration, and portable systems. High …
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Investigation of multiple-input single-output power conversion for advanced solar cell systems
Laterally-Arrayed Multiple-Bandgap (LAMB) solar cells provide the potential for improved energy capture, but require sophisticated interconnection and power conversion. Different topologies for a cell block interconnection were investigated and equations providing the estimated losses in those …
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The potential of immobilied algal cell systems for the removal of mercury from aqueous solution
… the growth of non-immobilized Chiorella at io cell ml. Batch culture experiments using 203 Hg showed that whilst mercury was removed from medium and accumulated by alginate-immobilized and non-immobilized Clzlorella, a considerable amount of mercury was lost by volatilization. Inunobilized …
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Modified Control for Single-Phase Fuel Cell Systems with Input Ripple Compensation and Improved Output Quality
Fuel cells serve as a clean, renewable and efficient source of electrical energy. The power conditioning system associated with their applications consist of a DC-DC converter stage and a DC-AC inverter stage. In a single-phase fuel cell system, the single-phase inverter introduces a second …
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Control of balance of plant components for solid oxide fuel cell systems with sensitivity to carbon formation
Solid oxide fuel cell systems have the potential to provide efficient, low greenhouse gas emitting power without the availability problems of both wind and solar energy. SOFC systems operate at high temperatures (600 C) in order to reduce ionic transport losses through a ceramic electrolyte. The …
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Optimisation of TrAEL-seq to study DNA damage and replication in complex and dynamic mammalian cell systems
Maintenance of genome stability is critical for cell survival, and consequently cells have evolved a complex set of mechanisms to ensure DNA is repaired and correctly replicated before cell division. Deficiencies in these repair pathways are heavily associated with the development of cancer and …
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Proton Exchange Membrane Fuel Cell Systems Based on Aromatic Hydrocarbon and Partially Fluorinated Disulfonated Poly(Arylene Ether) Copolymers
… in proton exchange membranes (PEM) for fuel cells. In particular the synthesis and characterization of materials for advanced alternative PEM were studied with an emphasis on structure-property and structure-property-performance relationships. The focus has included firstly a one-step …
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Renewable Electricity Generation via Solar-Powered Methanol Reforming: Hybrid Proton Exchange Membrane Fuel Cell Systems Based on Novel Non-Concentrating, Intermediate-Temperature Solar Collectors
… conversion of solar energy. Solar thermal power systems offer a compelling opportunity for renewable energy utilization with high efficiencies and excellent cost-effectiveness. The goal of this work was to design a non-concentrating collector capable of reaching temperatures above 250 °C, use …
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Synthesis and Chacterization of Novel Polybenzimidazoles and High-Solids Meta-Polybenzimidazoles
<p>Polymer electrolyte membrane (PEM) fuel cells are one of the most promising alternative power devices available due to their multiple applications as well as their clean and efficient operation. PEM fuel cells that operate at high temperatures (> 120oC) have advantages over low temperature PEM …
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